@Nullable
private static PsiClass getFieldOrMethodAccessedClass(
PsiReferenceExpression ref, PsiClass fieldOrMethodClass) {
PsiElement[] children = ref.getChildren();
if (children.length > 1 && children[0] instanceof PsiExpression) {
PsiExpression expr = (PsiExpression) children[0];
PsiType type = expr.getType();
if (type != null) {
if (!(type instanceof PsiClassType)) return null;
return PsiUtil.resolveClassInType(type);
} else {
if (expr instanceof PsiReferenceExpression) {
PsiElement refElement = ((PsiReferenceExpression) expr).resolve();
if (refElement instanceof PsiClass) return (PsiClass) refElement;
}
return null;
}
}
PsiManager manager = ref.getManager();
for (PsiElement parent = ref; parent != null; parent = parent.getParent()) {
if (parent instanceof PsiClass
&& (manager.areElementsEquivalent(parent, fieldOrMethodClass)
|| ((PsiClass) parent).isInheritor(fieldOrMethodClass, true))) {
return (PsiClass) parent;
}
}
return null;
}
